package thread;

public class SyncDemo4 {
    public static void main(String[] args) {
        Boo boo = new Boo();
        Thread t1 = new Thread() {
            public void run() {
              boo.methodA();
            }
        };
        Thread t2 = new Thread() {
            public void run() {
             boo.methodB();
            }
        };
        t1.start();
        t2.start();
    }
    }

class  Boo{
    public synchronized void methodA(){
        try {
            Thread t=Thread.currentThread();
            System.out.println(t.getName()+"正在执行方法A");
            Thread.sleep(5000);
            System.out.println(t.getName()+"A方法执行完毕");
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
    }
    public   void methodB(){
       synchronized (this){ try {
            Thread t=Thread.currentThread();
            System.out.println(t.getName()+"正在执行方法B");
            Thread.sleep(5000);
            System.out.println(t.getName()+"B方法执行完毕");
        } catch (InterruptedException e) {
            e.printStackTrace();
        }}
    }
}